It's a bit self-fulfilling, but mostly for giving skills to the next generation of makers, and trying to make the entertainment industry a smidge better if he's there. Noble, slightly selfish, and blunt. Just like how Sumire is
She's saying that she's ok sacrificing herself for his future. That the point is his growth, not her success.
And that’s where them being family is actually important, contrary to what Kanae says: she’s OK with being his stepping stone precisely because they’re that close.Beautiful chapter, shes fucked up in the pass but Yusei is one thing she'll take care of up to the end.